Improved fire and water proof cement



UNITED STATES PATENT OFFICE.

SAMUEL It. SCHARF, OF BALTIMORE, ASSIGNOR TO HIMSELF, JAMES .SPIUER, AND JAMES N. BUBNHAM, OF BALTIMORE COUNTY, MARYLAND.

IMPROVED FIRE AND WATER PROOF CEMENT.

Specification forming part of Letters Patent No. 88,745, dated April- 6, 1869.

To all whom it may concern Be it known that I, SAMUEL It. SCHARF, of Baltimore, in the county of Baltimore and State of Maryland, have invented a new and useful Improved Fire and Water Proof Roofin g-Cement; and I do hereby declare that the following is a full and exact description thereof. e

My invention or improvement in roofing-cement consists of a new composition of coaltar pitch, distilled coal-tar, hydraulic cement, fireproof paint, and copperas, prepared and used in the following manner:

Take of coa l ;tai pitch about twenty (20) irefly..fighte ;aiieirtfrarsanea;matter 9 "parts,thmreightrte 99f a mitt rtr. e0)

hydraulic oer weight; take'of fire proof pa ipts a W (8) parts,'b'y' \i'eiglit; tak of c oppera s a lrout one (1) paIt'fbYWE Tg'lTt-Tif The proportion "of'the several ingredients used'in the above composition may be varied according to the climate in which it is to be used, and the amount of heat and cold itis required to stand.

In applying the above composition or ceclosely fitted together, or rough boards co\ ered with felt. Then the coal-tar pitch and distilled coal-tar are put into a kettle and heated, when the copperas is added, and atterward the cement and paint, and the whole mass thoroughly mixed by stirring.

The mass, when hot enough for spreading,

' is applied to the boards, tin, or felt by means other timbers of various descriptions.

Having thus fully described my invention, claim- The above-described composition or roofingceinent, made and used substantially in the manner and for the purposes set forth.

- SAML. R. SCHARF.

- \Vitnesses:

G. W. DAVIS, SARAH E. SPARKs.

m cut for roofing purposes, I take either boards 

